Packet Data Serving Node
Encyclopedia
The Packet Data Serving Node, or PDSN, is a component of a CDMA2000
mobile network. It acts as the connection point between the radio access
and IP networks
. This component is responsible for managing PPP
sessions between the mobile provider's core IP network and the mobile station (mobile phone). It is similar in function to the GGSN (GPRS Gateway Support Node) that is found in GSM and UMTS networks.
Although PDSN is thought of being similar to GGSN in a conceptual sense, logically it's a combination of SGSN and GGSN in the CDMA world. It provides:
CDMA2000
CDMA2000 is a family of 3G mobile technology standards, which use CDMA channel access, to send voice, data, and signaling data between mobile phones and cell sites. The set of standards includes: CDMA2000 1X, CDMA2000 EV-DO Rev. 0, CDMA2000 EV-DO Rev. A, and CDMA2000 EV-DO Rev. B...
mobile network. It acts as the connection point between the radio access
Radio
Radio is the transmission of signals through free space by modulation of electromagnetic waves with frequencies below those of visible light. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space...
and IP networks
Internet Protocol
The Internet Protocol is the principal communications protocol used for relaying datagrams across an internetwork using the Internet Protocol Suite...
. This component is responsible for managing PPP
Point-to-Point Protocol
In networking, the Point-to-Point Protocol is a data link protocol commonly used in establishing a direct connection between two networking nodes...
sessions between the mobile provider's core IP network and the mobile station (mobile phone). It is similar in function to the GGSN (GPRS Gateway Support Node) that is found in GSM and UMTS networks.
Although PDSN is thought of being similar to GGSN in a conceptual sense, logically it's a combination of SGSN and GGSN in the CDMA world. It provides:
- Mobility management functions (provided by SGSN in the GPRS/UMTS networks)
- Packet routing functionality (provided by GGSN in the GPRS/UMTS networks)
See also
- Specifications for the PDSN are available from 3GPP2 TSG-X X.S0011 or TIA-835
- CDMA 2000
- Radio Network ControllerRadio Network ControllerThe Radio Network Controller is a governing element in the UMTS radio access network and is responsible for controlling the Node Bs that are connected to it. The RNC carries out radio resource management, some of the mobility management functions and is the point where encryption is done before...
- Starent Networks is the leading provider of PDSN. www.starentnetworks.com